Subscribe to real-time DTMF events
This code snippet registers a listener to receive asynchronous DTMF inputs from a call.
This is only applicable to Input NCCO events with the mode set to asynchronous.
Example
Replace the following variables in the example code:
| Key | Description |
|---|---|
VOICE_CALL_ID | The UUID of the call leg. |
VOICE_EVENT_URL | The URL (wrapped in an array) to send DTMF events to, as a POST request. |
Prerequisites
Execute the following command at your terminal prompt to create the JWT for authentication:
Run your code
Save this file to your machine and run it:
Prerequisites
Add the following to build.gradle:
Create a file named SubscribeToDtmfEvents and add the following code to the main method:
Write the code
Add the following to the main method of the SubscribeToDtmfEvents file:
Run your code
We can use the application plugin for Gradle to simplify the running of our application. Update your build.gradle with the following:
Run the following gradle command to execute your application, replacing com.vonage.quickstart.voice with the package containing SubscribeToDtmfEvents: